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"MORPHO-PHYSIOI,(X:lCAL AND BIOCHEMICAL ANALYSIS OF RICE GENOTYPES FOR WEED SUPPRESSION AND ALLELOPATHY

KrishiKosh

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Title "MORPHO-PHYSIOI,(X:lCAL AND BIOCHEMICAL ANALYSIS OF RICE GENOTYPES FOR WEED SUPPRESSION AND ALLELOPATHY
 
Creator Bansidharrao, Jadhav Abhay
 
Contributor Katiyar, Pratibha
 
Subject rice, weeds, genotypes, biological development, planting, extraction, vegetative propagation, developmental stages, drying, land resources
 
Description The present investigation entitled "Morpho-physiological and
biochemical analysis of rice genotypes for weed suppression and allelopathy"
was conducted in two cons'ecutive years in Kharif 2006 and 2007 at
Instructional farm, College of Agriculture, Indira Gandhi Krishi
Vishwavidyalaya Raipur (C.G.) under field and laboratory conditions in the
Department of Plant Physiology to explicit the weed suppression ability and
allelopathy among rice genotypes. The morpho-physiological traits involved
in field conditions and the impact of extract of plant parts on germination and
seedling growth behaviour of Echinochloa colona in laboratory conditions.
The biochemical compounds of rice genotypes i.e. Chlorophyll content, total
phenol content, total carbohydrate and total protein content were estimated
and correlated with weed growth.
The experiment was conducted in puddle transplanted rice (PTR)
imgated upland conditions in factorial randomized block design with spacing
20x20 cm. It was observed that the genotype Safri-17 followed by Vasumati
and Dubraj possessed highly weed suppression ability than other genotypes
under field conditions. The morpho-physiological traits i.e. plant height, plant
shoot biomass, photosynthetic rate, transpiration rate and growth parameters
leaf area (LA), leaf area index (LAI), crop growth rate (CGR) and relative
growth rate (RGR) were highly significant and negatively correlated with
weed biomass and responsible for weed suppression. However, grain yield of
rice was not found to be associated with weed suppression. But the genotypes
those having less difference in yield in weedy check (unweeded) and hand
weeding twice (control) situation remarkably found to be efficient for weed
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suppression. Safri-17 (L), Dubraj (L) and Vasumati (M) were found better in
this response. However, duration of crop was also not clearly proved any
significance on weed suppression. But it seems long duration genotypes
possessed the potential of weed suppression upto some extent.
The laboratory experiments revealed that the extract of rice plant parts
were significantly reduced the germination percentage and seedling growth
parameters particularly shoot length, root length, seedling dry weight and
vigour index of Echinochloa colona. The genotypes Vasumati, Dubraj and
Safri-17, plant parts (leaf, stem and roots) showed maximum adverse impact
on germination and seedling growth of E. colana than that of other
genotypes. The biochemical component total phenol content and carbohydrate
were significantly and negatively correlated with weed biomass. Rice leaf
possessed maximum phenol content and root possessed minimum. Safri-17,
Vasumati and Dubraj possessed higher phenol content (allelochemicals)
compared to other genotypes. Whereas, chlorophyll content were non
 
Date 2016-02-05T16:32:12Z
2016-02-05T16:32:12Z
2008
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/64180
 
Language en
 
Format application/pdf